Improvement in machines for punching and beveling metal



.T. MORGAN. MACHINES FOR PUNCHING AND BEVELIN'G METAL.

No.173,13Z.

Patented Feb. 8,1876.

N PETERS, PHOIO-LITHOGRAPHER WASHINGTON, D, Q

illvrrjnn STATES J'AMns MORGAN, or PrrrsBUne, PENNs-Ynv nil.

PA ENT O FICE.

IMPROVEMENT IN MACHINES FOR PUNCHING AND BEVELING METAL.

Specification forming part of Letters Patent Nol'73,l32, dated February 8, 1876; application filed January 6, 1876.

To all whom it may concern:

, .Be it known that I, JAMES MORGAN, of

Pittsburg, county of Allegheny, State of Pennsylvania, have invented or discovered a new and useful Improvementin Machine for Punching and Beveling Metal Plates; and I do hereby declare the following to be a full, clear, concise, and exact description thereof, reference being bad to the accompanying drawing making a part of this specification, in which like letters indicate like parts.

Figure'l is a rear-side elevation of my improved machine, with a portion of the framework broken away the better to illustrate some of its features of construction. Fig. 2 is anend view thereof. Fig. 3 is a view, in perspective, of a portion of a plate as punched and sheared. Fig. 4 is a detached View, in perspeclive,,of a portion of the extensible or adjustable rack-frame employed; and Fig. 5

is a detached view, showing, in perspective,-

the lower face of the punch-head and punch, the upper face of the die, and the end of the shear.

My present invention relates to certain improvements in the machine described in Letters Patent No.167,461, granted to me September 7, 1875, by means of which a greater range of feed adjustment is secured, also a better feeding motion, also a trimming of the plate along its edge preparatory to calking at the same time that it ispunched, and by the same operation, and also by means of which a better adjustment of the punch is effected with reference to the shear and die than has yet been attained.

The frame-work A, carrying the track-rails A, is such as is in use in similar machines, as

also the truck or carriage B and the feed-table B, the latter being pivoted at its center by pin and socket b, and guided in giving other than a straight feed by a rigid arm, g, shoe 9 play-. in g in a U-shaped adjustable guide, {1 all substantially as set forth in the patent above named. The usual rack and pinion h h are also employed vto run the carriage back after the conclusion of each line of punching. An extensible or adjustable rack, or, with a series of teeth or pins, to be engaged in succession by a pawl, c, is also employed as set forth in said patent, and the distance between pins is regulated by an adj usting-screw, n, also as described in said patent; but this extensible rack a, instead of being fixed when in'operation, is attach ed to a longitudinal reciprocating frame, 3, which moves on suitable ways or guides 8. To the under side of the frame 8 is secured a toothed rack, 1), into which the pinion b meshes, and from which it receives a reciprocating motion. This pinion is mounted on a crank-shaft,

d, and the latter is operated by a crank, d

The power necessary to operate this crank is communicated through any desired line of gearing, P P 1? 13 but so that a revolving crank, 0, may, while revolving, impart not a revolving but an oscillatory motion through the connecting-rod p to the crank d This motion may be secured in different ways,

though -I consider that shown in the drawing to be probably the best. The gear-wheels P and P are eccentrically arranged on their axes, and the crank 19 is attached on the axis of the wheel P3. With this arrangement, as

the crank 11 makes one full revolution, it will I caus c the pinion I) to make a part revolution each way, imparting at one-half of its motion an advance motion to the rack-frame s, and at. the other half a reverse motion. At the advance motion one of the teeth of the rack on engages the pawl c, and carries forward the carriage and feed-table,with the plate to be punched properly secured thereon, any desired fixed distance. The reverse motion of the pin ion and rack then begins, so as to bring the rack-frame .9 into position for beginning a new forward or feeding motion. During this motion the pawl c rises and slides over the teeth of the extensible frame, dropping into place after each tooth passes. The distance between punch-holes is determined by the length .of each feeding motion, and the latter is determined in part by the adjustment of the extensible rack a, as described in the patent above referred to, but is also further regulated by the use of theconnectin g-rod p and the slotted cranks d and 12. By adjusting the wrists which connect the ends of the rod 1). with the slots w in said cranks in or out along said slots, the length of feed motion given to the rackframe 8 may be varied at pleasure, so that with each reverse motion the pawl 0 may be made to pass one,two, or more teeth of the extensible rack a. Hence short changes in the distance between rivetrholes maybe made by the ad-- justment of the extensible rack, while it will be found more convenient to provide for the greater changes by the adj ustments of the wrists of the connecting-rod 19. For the purposes of this part of my invention, and as an elementin the combination hereinafter claimed, anyof the known forms or constructions of ad justable rack or rack-bars may be substituted for that shown at a.

At a I have shown a punch-head, which may be of any desired construction, as also the die d except that the latter is adjust-able laterally and longitudinally by means of set-screws d or in other equivalent way. The punch e is attached eecentrically to the end of a stem or spindle, c and the latter is inserted in the punch-head, so as to be rotated when desired, and thereby bring the'punch to a difierent position. The gearing is so arranged that the punch does its work during the cessation of the feeding motion. It is often desired to bevel the punched edge of the plate, as represented at q, Fig. 3, for greater convenience in calking or tightening thejoints. This work I do at the same time with the punching by means of a shear, i, pivoted as at "5 and having a counter-weighted stem, 1?. This shear is so hung as to cut the desired bevel, and in doing so the rear edge of the die (I constitutes its counter-shear. Hence the die d is made adjustable, as described, so as to be brought to the proper point in the operation of shearing. The punch c is then brought into line with the punch-hole in the die by rotating the stem or spindle 0 The twobeing in line, the die d is moved longitudinally, as may be necessary, so as to bringthe punch-hole directly under the punch. The cutting stroke of the shear is effected by the endfor other part of the punchhead e coming against the head or other part of the shear back of or above its cutting-edges, the punch preferably moving a little in advance of the shear, so as to .catch and hold the plate firmly while the shearing is being done; and if a plate is not properly trimmed before the operation ot'punchin g is commenced, the shear may be likewise employed for doing such trimming. The reverse movement of the shear is effected by the weighted stem or in other suitable way. 7 i

I claim herein as my invention- 1. The connecting-stem 12, having an adj ustable crank-connection at each end, in combination with a rack and pinion, an extensible or adjustable rack, a feed-carriage, and pivoted table, substantially as set fort 2. An extensible rack, a, in combination with a rack and pinion arranged to operate with alternate forward and reverse motions, substantially as set forth.

3. The combination ofa punch, die, and beveling-shear, whereby the plate is prepared for calking at the same time that it is punched, substantially as set forth.

4. In combination with an adjustable die, 01, a punch, a, connected with its die-head by an eccentric stem, substantially as set forth.

5. The combination of eccentric gear-wheels 1? P slotted cran ks p d, and stem 1), arranged substantially as set forth.

In testimony whereof I have hereunto set my hand. JAMES MORGAN.

Witnesses:

J N0. A. WILSON, GEo. H. UHRISTY. 

